It was just so recent that Haiti was strucked by an earthquake that merely destroyed all structures and killed over thousands. Last Friday, Philippines and Japan both experienced 5.7 magnitude earthquakes. And not a day passed, Chile was hit 8.8 magnitude earthquake and killed 147 people, destroyed bridges and toppled houses and buildings. This day Argentina was hit by another 6.3 magnitude Earthquake.
Earthquakes.An earthquake (also known as a quake, tremor, or temblor) is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as a seismograph. The moment magnitude (or the related and mostly obsolete Richter magnitude) of an earthquake is conventionally reported, with magnitude 3 or lower earthquakes being mostly imperceptible and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale.